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https://issues.apache.org/jira/browse/HBASE-10535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13901773#comment-13901773
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Jean-Marc Spaggiari commented on HBASE-10535:
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I see this as "trash" beeing the namespace and "myspace:mytable" being the
table name. Not really a nested namespace.
> Table trash to recover table deleted by mistake
> -----------------------------------------------
>
> Key: HBASE-10535
> URL: https://issues.apache.org/jira/browse/HBASE-10535
> Project: HBase
> Issue Type: Improvement
> Reporter: Liu Shaohui
> Priority: Minor
>
> When table is deleted, only Hfiles are moved to archives dir, table and
> region infos are deleted immediately. So it's very difficult to recover
> tables which are deleted by mistakes.
> I think if we can introduce an table trash dir in HDFS. When the table is
> deleted, the entire table dir is moved to trash dir. And after an
> configurable ttl, the dir is deleted actually. This can be done by HMaster.
> If we want to recover the deleted table, we can use a tool which moves table
> dir out of trash and recovery the meta data of the table. There are many
> problems the recover tool will encountered eg, parent and daughter regions
> are all in the table dir. But I think this feature is useful to handle some
> special cases.
> Discussions are welcomed.
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